Electrically-controlled shedding device in looms for weaving figured fabrics



Sept. 17, 1929. NAKANlsHl/ 1,728,438

ELECTRIOALLY CONTROLLED SHEDD'ING DEVICE IN LQOMS FOR WEAVING FIGURED FABRICS Filed Nov. 5, 1926 2 Sneets-Sheet 1 :11; L nk chm-m,

Sept. 17, 1929. K. NAKANISHI 4 8 ELECTRICALLY CONTROLLED SHEDDING DEVICE IN LOOMS FOR WEAVING FIGURED FABRICS Filed Nov. 5, 1926 2 Sheets-Sheet 2 mum l atented Sept. 17; 1929 UNITED STATES) PATENT OFFICE KINJ'IBO NAKANISHI, OI FUKUOKA, JAPAN ELEGTBICALLY-CONTROLLED SHEDDING DEVICE IN LOOKS FOB WEAVING IIGUBED FABRICS Application m November 5, 1926. Serial no. 148,483.

My invention relates to shedding "motion in looms for weaving figured fabrics, particularly electrically controlled devices. The object of my invention is to provide devices for: effecting shedding without employing any perforated card heretofore used in jacquard and dobby machines, and capable of weaving any elaborately figured fabric in most reliableand speedy manner.

The accompanying drawings illustrate my invention, in which Figure 1 is a diagrammatic view of the apparatus according to my invention including the electrical connection,

Figure 2 isa detail showing diagrammatically an end view of the pattern cylinder and the brush in contact therewith,

Figure 3 shows a modified form of the hook and the electro-magnet acting thereon,

Figure 4 shows another modified form of the hook and the electro-magnet.

Figure 5 is a fragmentary plan view of the brush, and

Figure 6 shows a cross section thereof in a larger scale.

According to my invention, a pattern sheet comprises an electrically conducting element and an insulating element, and it 15 formed into a cylindrical shape or into an endless band. For instance, a conducting surface 1 representing the desired figure is formed on the blank 2 composed of an insulating material. Said pattern sheet is wound around a cylinder 4 which is journaled in brackets 5 for step-by-step motion. In contact with the pattern cylinder 4 is a brush 8 which consists of a plurality of resilient conducting strips 6 (each having a pointed tip) which are interlaced by insulating fibrous material 7, such as silk threads, hemp threads, or parafline coated cotton threads. Said brush 8 is carried by a holder 9 which is provided with a bore 10 and is thereby mounted on the spindle 11 which in turn is journalled in brackets 12.

- Thus, the brush 8 is normally held in contact with the pattern 3.

The bottom late 13 supports the lower ends, of the hoo s 14, and it is provided with a plurality of bores 15 through which pass the cords tied to said hooks 14. Arranged above the bottom plate 13 is a grid plate 16 Y I which up is provided with a corres onding numberofbores 15' through which said hooks 14 pass, each of the said bores 15' being of such a size that it permits slight tilting of the corresponding hook 14 from the vertical limiting the movement to the predetermined extent. Each hook 14 has an upper bent 17 which is adapted to engage with the corresponding one of the knives 20 secured to the inside of the carrier box 19. To said box 19 is connected an oscillating lever 18 thereby to raise and lower the box 19 within the redetermined range. Mounted on the gri plate 16 there are provided a plurality ofelectromagnets 21 adjacent the respective book 14. One end of the winding of each Ina et 21 is connected to the respective con ucting strip 6 of the brush 8 by means of the conductor 22, thus each conducting strip 6 of the brush is connected in series with the respective magnet 21.

Extending from one end 16 is an upright bracket 23 on which is mounted a stationary contact 24 electrically insulated therefrom. Mounted on one side of the moving box 19 is a resilient contact 26 superposed upon a resilient insulator 25, the former being slightly shorter than the latter, and said resilient contact 26 is adapted to cooperate with the contact 24.

The battery, generator, or any other source of current 27 is, on one hand, connected by means of conductor 29 to the contact 28 normally held in contact with the cylinder 4 and on the other hand, is connected by means of the conductor 30 to the pivot 31 of the oper-' ating lever 18. The other ends of the windings of the magnets 21 are connected, by means of the conductor 32 to the stationary contact. Thus, it will be seen that with the source of current 27 are connected in parallel corresponding numbers of circuits each including one of the strips 6 of the brush S and one of the magnets 21.

In the modification shown in Figure 3, the separate upper bent 17 'is fulcrumed to the upper end of the vertical rod 14' in such a manner that it is adapted to tilt toward the knife 20. The magnet 21' is provided with an of the grid plate I L- shaped core having poles 0 adapted when energized to pull the said upper bent 17' laterally.

In the modification shown in Figure 4, the

vertical rod 14;" is provided with a triangumagnet 21" is enclosed. The magnet 21' acts to pull the upper end of the pivoted hook member 17 to swing the latter and bring the lower end of same into the position to be engaged by the knife 20.

The operation of my invention briefly is as follows :The pattern 3 is rotated step-bystep accurately timed to suit the swinging movement of the slay and the shedding motion of the figuring warps, whereby the position of the conducting and insulating portions 1 and 2 relative to the conductingstrips 6 of the brush Sis successively varied. Thus, each strip Geo-operating at the time with the conducting portion 1 of the pattern is adapted to supply current from the source 27 to the respective magnet 21 when the circuit is closed. On the other hand, the magnets 21 belonging to the strips 6 which are in contact with the insulating portion 2 of the pattern do not receive any current. During the rising movement of the box 19, the resilient contact 26 will come into contact with the stationary contact'24. Then, the magnets 21 included at the time in the closed circuits will act upon the hooks 14 pertaining thereto and pull the latter, thereby bringing the upper bents 17 into the position not to be e aged by the respective knives 20. On the other hand those magnets which are at the time included in the open circuit will not pull the hooks 14 per-" taining thereto, so that the upper bents 17 of those hooks will assume, by gravity, the inclined position adapted to be engaged by respective lmives 20. Therefore, on succeeding rising movement of the box 19, said inclined hooks 14 which are not pulled by the magnets will ascend to form a top sh ed 'of the figuring warp pertaining thereto. 3

As described above, my invention comprises the brush 8 consisting of a plurality of conducting strips 6 insulated from eac other by insulating threads which interlace the strips, said strips 6 being pressed on the pattern sheet 3 having a conducting portion 1 and insulating portion 2, each conducting strip 6 being connected in series with the winding of the magnet 21 pertaining'thereto, and a plurality of such series circuits each including the strip 6 and the magnet 21 connected in parallel with the source of current tern 3 being repeated by the shedding apparatus. Therefore, according to my invention, the fabrics with anydesired elaborate figures may be readily woven without necessitating the employment of the perforated cards heretofore used in jacquard and dobby machines.

- It is to be understood that I do not limit myself to the arrangement of apparatus as shown and described above, since the invention as set forth in my claims may be embodied in a plurality of forms. Instead of using a cylindrically formed pattern, the flat pattern sheet may be provided. The arrange ment of the circuit including the magnet and the conducting strip 6 of the brush as well as the construction of the contact devices 24 and 26 may be altered. Instead of insulating the strips 6 of the brush by means of fibrous threads interlacing same, the strips may be insulated from each other by embedding them in ebonite or other insulating material.

What I claim is 1. An electrically'controlled shedding apparatus in looms for weaving figured fabrics and including hooks, comprising a pattern sheet having an electrically conducting surface and an electrically insulating surface, a brush consisting of a plurality of conducting strips insulated from each other and normally held in contact with said pattern sheet, a plurality of electro-magnets each connected in series with one of said conducting strips and adapted to act on the hooks, each hook comprising a rod and a triangle member pivoted thereto, and each electric-magnet being arranged adjacent one of said triangle memthe arrangement being such that the said contacts close the circuits so as to energize the selected magnets upon the rising movement of said knife carrying box.

In testimony whereof I aflix my signature.

KINJIRO NAKANISHI.

27, thereby facilitating the figures on the pat- 

